adams



(No Model.) 2 SheetsSheet 1. J. S. ADAMS. STRUOTURE FOR SUPPORTING LAMPS ABOVE STREETS.

No. 410,626. Patented Sept. 10, 1889.

WJZN'ESSES. I VVEVTOR. 0%14/ Gym Q I M 7 j ATTORNEYEL hupmphnr. Washington. D. c.

N. PETERS Pnowm (No Model.) 2 Sheets-Sheet 2.

J. S. ADAMS. STRUCTURE FOR $UPPORTING LAMPS ABOVE STREETS. No. 410,626. Patented Sept. 10, 1889.

a v irl,

UNITED STATES PATENT OFFICE.

JOHN S. ADAMS, CF INDIANAPOLIS, INDIANA, ASSIGNOR TO THE JENNEY ELECTRIC COMPANY, OF SAME PLACE.

STRUCTURE FOR SUPPORTING LAMPS ABOVE STRE ETS.

SPECIFICATION forming part of Letters Patent No. 410,626, dated September 10, 1889. Application filed October 11, 1888. Serial No.28'7,831. (N0 model.)

To all whom it may concern.-

Be it known that I, JOHN S. ADAMS, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Structures for Supporting Lamps above Streets, of which the following is a specification.

The object of my said invention is to pro vide a bridge structure adapted to support electric lamps over streets at their intersections and other places, which shall be of a simple and durable construction, and at the same time one which will support the lamp rigidly and securely while in use and be capable of being operated to bring the lamp within convenient reach of a workman when it is desired to put in new carbons, or have access to the lamp for any reason, without any danger of disarranging or breaking any part of the lamp. This obj ect is accomplished by constructin g a bridge suitably arranged to carry the lamp in proper position and pivoting said bridge between two posts located on opposite sides of the streets in such a manner as to permit it to be turned over or inverted when it is desired to bring the lamp within reach, and pivoting or hinging said lamp at its top in the frame which supports it, so that it will swing out of said frame when the bridge is inverted and hang in an upright position from said pivot, as will be hereinafter more fully set forth.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters indicate similar parts, Figure 1 is a front elevation of the bridge as it appears when erected and in posit-ion for use, the inverted position which it occupies when it has been operated to have access to the lamp being indicated by dotted lines; Fig. 2, a top or plan view of the same; Fig. 3, an end elevation; Fig. 4, a front elevation of the lamp and adjacent parts on an enlarged scale; Fig. 5, a side elevation of the same; Fig. 6, a detail perspective view of the parts by which the pivotal connection between the bridge and post is made; Fig. 7, a detail sectional view of one of the top corners of the lampframe, and Fig. 8 a detail section on the dotted line 8 8 in Fig. 4.

In said drawings the portions marked A represent the posts which support the bridge; 13 B B B the several parts of said bridge; C, the lamp 5D, stay wires or ropes, and E the electric line-wires.

The posts Aare of the required height and strength, being firmly secured in position and preferably stayed by guys A, running from near their tops to suitable anchors provided along the line of the curb. Near their top they are provided with a square transverse perforation, in which is mounted a square shank extending out from the inside of said post and formed with a U-shaped end a. The end which is mounted in the post is provided with an internal screw-threaded perforation, into which is screwed abolt a, be tween the head of which and the rear side of the post is interposed a coiled spring a which serves to compensate for the contraction and expansion of the structure by heat and cold. On each side-of the post at this point is secured a metal plate a the one on the inner side being formed with a square perforation to correspond with the shank a, and thus afford it a secure bearing.

The bridge is of a truss formation and of suitable strength to support the lamp. It is constructed of a central vertical truss-rod B, connected by truss-cables B to an end frame B at each end of the structure. Said end frames B consist of a central five-part coupling in which are secured arms extending out horizontally 011 each side thereof at right angles with the central post B, said horizontal arms being of substantially the same length as said central post. Shorter arms are secured in the upper and lower sides of said coupling, and the adjacent ends of said several arms are connected by short truss-rods 17, thus giving said end frames a diamond-shaped formation and one which combines lightness with great strength. In the outer side of said coupling is secured a rearwardly-projecting arm B which terminates in a U-shaped part Z), of a similar formation to the part a, which is secured in the post. The outer ends of these two parts 1) and a are interlocked, as shown in Fig. 6, being secured together by a pivot or bolt 11 In the preferable construction the arm B as Well as nearly all of the framework, is formed of hollow iron pipe, and the U -shaped coupling device I) is screwed therepivoted by the pivot c to the cross-tree C on. The ends of the horizontal arms of the end frames are also trussed back to the end of the arm B by means of the truss-rods b preferably connected to the inner end of the part b, as shown. The central post B is provided with atwo-part coupling B on each end thereof, which are formed with laterally-proj ecting wings b on their sides, which are perforated to form bolt-holes. On opposite sides of said wings are secured, by means of bolts passing through said perforations, clampingjaws 12 between which and said wings the truss-cables B pass, and are thus firmly secured at their centers to the bottom and top of said post or central truss-rod B. Said trusscables are arranged in pairs, one being secured on each side of the post B, both at its top and bottom, and extending to the ends of the horizontal arms of the end frames B to which they are securely attached. By this construction a very stiff and strong truss structure is provided at comparatively little expense. On the lower end of the post B is secured a weight B by means of a bolt passing through said weight and engaging with the lower side of the two-part coupling on its lower end. Said weight is designed to serve as a counterbalance to the lamp 0 on the top of the frame-work.

The lamp 0 is, in the main, of the usual construction, being secured rigidly at its top to a shaft 0, which has its hearings in the top of the frame 0 which is mounted on the top of the lamp-post C in the usual or any desired manner. Said lamp-post O is screwed into the top of the coupling B on the top of the post B and practically forms a continuation thereof. To secure the lamp from swing ing when in use, I have secured to the base of the frame (J an arm 0, which extends up and in against the base of the lamp, and on its opposite side I have pivoted a similar arm 0', the lower end of which is formed in the shape of a bell-crank lever. The outer end of the lever part of said arm 0 is connected by a rod 0 to a double bell-crank lever 0 which is mounted on the lamp-post 0 To the ends of said double bell-crank lever are attached wires or cords G which run over suitable bearings on the end of the bridge and down alongside of the post A, where they are secured in a convenient posltion to be 7 reached.

,back over the rearwardly-extended arm B and down to the same position on the post, the use of which will be presently described. The line-wires E pass in from insulators secured on the cross-trees near the top of the posts A, pass through the hollow arms B of the end frames up to insulators on the crosstrees C on the lamp-post C and up to the clamps e at the top of the lamp-frame, in which they are secured. Said clamps e are secured to the end of a short metalic shaft E mounted'in a metallic box 6', secured in the sides of the wooden block E which is secured on the end of the shaft 0 of the lamp. Said shaft E is formed with a split hollow end, the parts of which tend to spread outwardly, thus maintaining a friction-bearing in the box 0'. In one corner of said box is formed an eye 6 adapted to receive the end of a wire, which is clamped therein by set-screw 6 said wire passing around to the top'of the lamp and being connected to the mechanism thereof, thus establishing the current which comes in over one line-wire to one side of the lamp and out over the other line-wire at the other side of the lamp in the well-known manner.

The operation of my said invention 'is as follows: The structure being in operative condition and ready for use, as shown in Fig. 1, and it being desired to have access to the lamp for the purpose of putting in new carbons, or for any other reason, the operator first pulls on that wire or rope C which will throw back the arm 0 and permit the lamp to' swing in this direction on its shaft out of the frame. The stay-ropes D are then disengaged and the operator pulls down upon that one which will turn the structure in the desired direction until the end of the arm to which said stay-rope is attached is in its lowest position, when he takes hold of the rope D, attached to the opposite end of the arm, which end is now in its highest position, and continues to turn the structure until it occupies an inverted position, as indicated by dotted lines in Fig. 1. The entire structure then occupies an inverted position, with the exception of the lamp 0, the shaft 0 of which has turnedin the bearing formed in the frame 0 and allowed said lamp to at all times maintain its normal condition, and when the structure is completely inverted to hang from its top completely out of the frame. In constructing this device the lamp-post C is made of the length necessary not only to I bring the light to the desired height, but also to lower it, when the structure is inverted, to a position which can be conveniently reached by the workman. After the lamp has been fixed and is ready to be returned to the position it occupies when in use the operator reverses the structure to its upright position in the same manner in which it was inverted, and secures it in this position by the stay-rope D, as before described. He then, through the appropriate rope or wire 0 tips back the arm 0 against the base of the lamp, and then fastens said wires or ropes to said post, thus securing the lamp from swinging and insuring that the light shall be steady and secure.

By this construction and arrangement a support is provided for electric lamps, (and other lamps, if desired,) by which they may be supported over the middle of a street or at a central point of intersection where two streets cross, in a rigid and secure manner and the lamp rendered convenient of access. The structure, by reason of its peculiar construction, is not only very strong and rigid, but is also very light and durable and presents a neat appearance.

While several of the details of construction are not of much importance, in so far as the purposes of the invention are concerned, as other mechanical equivalents could be substituted without departing from said invention, yet they are particularly described in order that the whole construction may be fully understood.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is

1. A structure for supporting lamps over streets, consisting of abridge pivoted between suitable posts and provided with suitable supports for said lamp, located on one side of the axis, substantially as set forth.

2. As a structure for supportinglamps over streets, a pivoted or invertible bridge having suitable supports for the lamp, located on one side of the axis, substantially as set forth.

3. In a structure for supporting lamps over streets, the combination of the posts, and a truss structure carrying the lamp pivotally secured between said posts and on one side of the axis of said structure, whereby it may be inverted, substantially as set forth.

4. In a structure for supporting lamps over streets, the combination of a bridge pivotally arranged above said street, thelamp mounted on said bridge and pivoted at its top in the frame in which it is mounted and to one side of the axis of said structure, substantially as set forth.

5. In a structure for supporting lamps over streets, the combination of the posts arranged on each side of the street, the bridge structure pivotally secured between said posts, the lamp on the top of said structure, and a counterbalance-weight on its bottom, substantially as set forth.

6. The combination, in a structure forsupporting lamps above streets, of the posts A, the U-shaped part a, secured at its top, the bridge structure, consisting of central post B, the trusses B, and end frames B said end frames being provided with the arms B terminating in the U-shaped part I), said U- shaped parts I) and a being interlocked and pivoted together, and the means for securing and operating the structure, substantially as set forth.

7. In a structure for supporting lamps above streets, the combination of the end posts, the bridge structure pivotally secured between said posts, the lamp mounted on the top of said bridge structure and pivoted in the top of its frame, and the means for securing said lamp from turning on its pivot when desired, substantially as set forth.

8. The combination of the posts A, the bridge structure pivotally secured between them, the lamp 0, mounted on the top of said bridge in the frame C and shaft journaled in hearings in said frame, the part c, secured to the base of the frame and extending up to rest against one side of the base of the lamp, the pivoted part c resting against the other side of said base, and the means, substantially as described, for operatin git, whereby the lamp may be secured from swinging and released when desired, substantially as set forth.

9. In a structure for supporting lamps over streets, the combination of the end posts and a truss-bridge carrying the lamp on one side of its axis, consisting of a central post connected by a pair of truss-cables secured to each of its ends, to the ends of the arms of the end frames which extend out in a plane at right angles to said central post, said end frames being connected to said end posts, substantially as set forth.

10. The combination of the posts A and the bridge structure pivotally secured between them, consisting of the central post B, the truss-cables B, the end frames B and the arms B pivotally connected to said posts A, substantiallyas set forth.

11. The combination of the posts A, the bridge structure consisting of the central post B, connected by truss-cables to suitablyformed end frames which are pivotally-supported by said posts, said central post B being provided with a coupling B at its top and bottom, and said coupling being formed with laterally-projecting wings, and the clampingjawsb, bolted thereon, said truss-cables being clamped between said jaws and said wings, substantially as set forth.

12. The combination of the posts A, the parts a, formed with U-shaped ends secured in the tops of said posts, a coiled spring a interposed between the outer end of said parts and said posts, the truss-bridge carrying the lamp on its top and provided with the U- shaped parts I), attached to its ends, which are interlocked and pivotally connected with said parts a, substantially as set forth.

In witness whereof I have hereunto set my hand and seal, at Indianapolis, Indiana, this 8th day of October, A. D. 1888.

JOHN S. ADAMS. [L. s.]

W itnesses:

O. BRADFORD, E. W. BRADFORD.

IOC 

